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Finding the Fourth Proportional to 719,353.47, 992,707.85 and 397,063.65

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Solution

The fourth proportional to 719,353.47, 992,707.85 and 397,063.65 is: 547,947.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,353.47 : 992,707.85 = 397,063.65 : x
  2. Step 2: Convert to fraction form
    719,353.47/992,707.85 = 397,063.65/x
  3. Step 3: Cross multiply
    719,353.47x = 992,707.85 × 397,063.65
  4. Step 4: Simplify right side
    719,353.47x = 394,168,207,019.97
  5. Step 5: Solve for x
    x = 394,168,207,019.97/719,353.47
  6. Step 6: Final answer
    x = 547,947.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.